@misc{indiciae626ed11bff31,
  title = {Internal validity.},
  author = {G A Morgan and J A Gliner and R J Harmon},
  year = {2000},
  doi = {10.1097/00004583-200004000-00024},
  url = {https://pubmed.ncbi.nlm.nih.gov/10761357/},
  note = {Source identifier: 10761357}
}